Abstract

The reaction of Xe*(3P2,0) with IBr to form the XeI* and XeBr* excimers was studied using two crossed molecular beam techniques. Emission spectra were obtained between 200 and 400 nm, and relative cross sections and branching ratios were measured as a function of collision energy over the range 15–420 meV. The observed effects are discussed in terms of a curve crossing model, involving the neutral potential surface and both ground and excited Xe++IBr−potential surfaces. In this model, XeBr* is formed from the ground state ionic potential and XeI* is formed from the excited potential.